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发明名称
Film holder
摘要
申请公布号
US1929283(A)
申请公布日期
1933.10.03
申请号
US19320604056
申请日期
1932.04.08
申请人
MILLER WILLIAM J
发明人
MILLER WILLIAM J.
分类号
G03D13/12
主分类号
G03D13/12
代理机构
代理人
主权项
地址
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